package com.jt.chapter06.utils;


import org.springframework.stereotype.Component;

import java.awt.*;
import java.awt.image.BufferedImage;
import java.util.Random;

/**
 * @author jiang tao
 * @date 2022/1/19
 * @description:
 **/
@Component
public class ImageCodeGenerator {

      public ImageCode generateImageCode(){
        int width = 67;
        int height = 23;
        BufferedImage image = new BufferedImage(width,height,BufferedImage.TYPE_INT_RGB);

        Graphics g = image.getGraphics();

        Random random = new Random();
        
        g.setColor(getRandColor(200,500));
        g.fillRect(0,0,width,height);
        g.setFont(new Font("Times New Roman", Font.ITALIC,20));
        g.setColor(getRandColor(160,200));
        for (int i = 0;i < 155; i++){
            int x = random.nextInt(width);
            int y = random.nextInt(height);
            int xl = random.nextInt(12);
            int yl = random.nextInt(12);
            g.drawLine(x,y,x+xl,y+yl);
        }
        String sRand = "";
        for(int i = 0;i < 4; i++){
            String rand = String.valueOf(random.nextInt(10));
            sRand += rand;
            g.setColor(new Color(20 + random.nextInt(110),20 + random.nextInt(110),20 + random.nextInt(110)));
            g.drawString(rand,13 * i + 6,16);
        }
        g.dispose();
        return new ImageCode(image,sRand,60);

        
    }

    private Color getRandColor(int fc, int bc) {
        Random random = new Random();
        if(fc > 255){
            fc = 255;
        }
        if(bc > 255){
            bc = 255;
        }
        int r = fc + random.nextInt(bc - fc);
        int g = fc + random.nextInt(bc - fc);
        int b = fc + random.nextInt(bc - fc);
        return new Color(r,g,b);
    }
}
